@inproceedings{StaatSzelinskiHeitzer2001,
  author    = {Staat, Manfred and Szelinski, E. and Heitzer, Michael},
  title     = {Kollapsanalyse von l{\"a}ngsfehlerbehafteten Rohren und Beh{\"a}ltern},
  year      = {2001},
  abstract  = {Es werden verbesserte Kollapsanalysen von dickwandigen, mit axialen Oberfl{\"a}chenfehlern behafteten Rohren und Beh{\"a}ltern vorgeschlagen.},
  subject      = {Druckbeh{\"a}lter},
  language  = {de}
}
@inproceedings{StaatHeitzerReindersetal.2001,
  author    = {Staat, Manfred and Heitzer, Michael and Reinders, H. and Schubert, F.},
  title     = {Einspielen und Ratchetting bei Zug- und Torsionsbelastung: Analyse und Experimente},
  year      = {2001},
  abstract  = {Traglast- und Einspielanalysen sind vereinfachte doch exakte Verfahren der klassischen Plastizit{\"a}tstheorie, die neben ausreichender Verformbarkeit keine einschr{\"a}nkenden Voraussetzungen beinhalten. Die Vereinfachungen betreffen die Beschaffung der Daten und Modelle f{\"u}r Details der Lastgeschichte und des Stoffverhaltens. Eine FEM-basierte Traglast- und Einspielanalyse f{\"u}r ideal plastisches Material wurde auf ein kinematisch verfestigendes Materialgesetz erweitert und in das Finite Element Programm PERMAS implementiert. In einem einfachen Zug-Torsionsexperiment wurde eine Hohlprobe mit konstanter Torsion und zyklischer Zugbelastung beansprucht, um die neue Implementierung zu verifizieren. Es konnte gezeigt werden, dass die Einspielanalyse gut mit den experimentellen Ergebnissen {\"u}bereinstimmt. Bei Verfestigung lassen sich wesentlich gr{\"o}ßere Sicherheiten nachweisen. Dieses Potential bedarf weiterer experimenteller Absicherung. Parallel dazu ist die Eisnpieltheorie auf fortschrittliche Verfestigungsans{\"a}tze zu erweitern.},
  subject      = {Zug-Druck-Beanspruchung},
  language  = {de}
}
@article{Staat2001,
  author    = {Staat, Manfred},
  title     = {Cyclic plastic deformation tests to verify FEM-based shakedown analyses},
  year      = {2001},
  abstract  = {Fatigue analyses are conducted with the aim of verifying that thermal ratcheting is limited. To this end it is important to make a clear distintion between the shakedown range and the ratcheting range (continuing deformation). As part of an EU-supported research project, experiments were carried out using a 4-bar model. The experiment comprised a water-cooled internal tube, and three insulated heatable outer test bars. The system was subjected to alternating axial forces, superimposed with alternating temperatures at the outer bars. The test parameters were partly selected on the basis of previous shakedown analyses. During the test, temperatures and strains were measured as a function of time. The loads and the resulting stresses were confirmed on an ongoing basis during performance of the test, and after it. Different material models were applied for this incremental elasto-plastic analysis using the ANSYS program. The results of the simulation are used to verify the FEM-based shakedown analysis.},
  subject      = {Materialerm{\"u}dung},
  language  = {en}
}
@article{Staat2001,
  author    = {Staat, Manfred},
  title     = {LISA - a European project for FEM-based limit and shakedown analysis},
  year      = {2001},
  abstract  = {The load-carrying capacity or the safety against plastic limit states are the central questions in the design of structures and passive components in the apparatus engineering. A precise answer is most simply given by limit and shakedown analysis. These methods can be based on static and kinematic theorems for lower and upper bound analysis. Both may be formulated as optimization problems for finite element discretizations of structures. The problems of large-scale analysis and the extension towards realistic material modelling will be solved in a European research project. Limit and shakedown analyses are briefly demonstrated with illustrative examples.},
  subject      = {Einspielen <Werkstoff>},
  language  = {en}
}
@inproceedings{HeitzerStaat2000,
  author    = {Heitzer, M. and Staat, Manfred},
  title     = {Direct FEM approach to design-by-analysis of pressurized components},
  year      = {2000},
  abstract  = {Abstracts of the ACHEMA 2000 - International Meeting on Chemical Engineering, Environmental Protection and Biotechnology, May 22 - 27, 2000. Frankfurt am Main. Achema 2000 : special edition / Linde. [Ed.: Linde AG. Red.: Volker R. Leski]. - Wiesbaden : Linde AG, 2000. - 56 p. : Ill., . - pp: 79 - 81},
  subject      = {Finite-Elemente-Methode},
  language  = {en}
}
@article{StaatHeitzer2000,
  author    = {Staat, Manfred and Heitzer, M.},
  title     = {Traglastanalyse - ein strukturmechanisches Verfahren zur Beurteilung von gerissenen Bauteilen und Verbindungen},
  series = {Festigkeits- und Bruchverhalten von F{\"u}geverbindungen : 32. Tagung des DVM-Arbeitskreises Bruchvorg{\"a}nge ; 22. und 23. Februar 2000 in Berlin / Richard, H. A. [Hrsg]},
  journal   = {Festigkeits- und Bruchverhalten von F{\"u}geverbindungen : 32. Tagung des DVM-Arbeitskreises Bruchvorg{\"a}nge ; 22. und 23. Februar 2000 in Berlin / Richard, H. A. [Hrsg]},
  publisher = {Deutscher Verband f{\"u}r Materialforschung und -pr{\"u}fung},
  address   = {Berlin},
  pages     = {183 -- 192},
  year      = {2000},
  language  = {de}
}
@article{StaatHeitzer2000,
  author    = {Staat, Manfred and Heitzer, M.},
  title     = {Reliability Analysis of Elasto-Plastic Structures under Variable Loads},
  series = {Inelastic analysis of structures under variable loads : theory and engineering applications / Maier, G.; Weichert, D. [ed]},
  journal   = {Inelastic analysis of structures under variable loads : theory and engineering applications / Maier, G.; Weichert, D. [ed]},
  publisher = {Kluwer Academic Publ.},
  address   = {Dordrecht},
  isbn      = {0-7923-6645-X},
  pages     = {269 -- 288},
  year      = {2000},
  language  = {en}
}
@article{StaatHeitzer2000,
  author    = {Staat, Manfred and Heitzer, M.},
  title     = {Direct FEM approach to design-by-analysis of pressurized components},
  series = {Achema 2000 : Sonderausgabe / Linde. [Hrsg.: Linde AG. Red.: Volker R. Leski]},
  journal   = {Achema 2000 : Sonderausgabe / Linde. [Hrsg.: Linde AG. Red.: Volker R. Leski]},
  publisher = {Linde AG},
  address   = {Wiesbaden},
  pages     = {79 -- 81},
  year      = {2000},
  language  = {de}
}
@book{StaatHeitzerYanetal.2000,
  author    = {Staat, Manfred and Heitzer, M. and Yan, Ai-Min and Khoi, Vu Duc and Nguyen, Dang Hung and Valdoire, F. and Lahousse, A.},
  title     = {Limit Analysis of Defects},
  publisher = {Forschungszentrum J{\"u}lich},
  address   = {J{\"u}lich},
  issn      = {0944-2952},
  pages     = {89 S.},
  year      = {2000},
  language  = {en}
}
@inproceedings{StaatHeitzer2000,
  author    = {Staat, Manfred and Heitzer, Michael},
  title     = {Direct static FEM approach to limit and shakedown analysis},
  year      = {2000},
  abstract  = {Safety and reliability of structures may be assessed indirectly by stress distributions. Limit and shakedown theorems are simplified but exact methods of plasticity that provide safety factors directly in the loading space. These theorems may be used for a direct definition of the limit state function for failure by plastic collapse or by inadaptation. In a FEM formulation the limit state function is obtained from a nonlinear optimization problem. This direct approach reduces considerably the necessary knowledge of uncertain technological input data, the computing time, and the numerical error. Moreover, the direct way leads to highly effective and precise reliability analyses. The theorems are implemented into a general purpose FEM program in a way capable of large-scale analysis.},
  subject      = {Einspielen <Werkstoff>},
  language  = {en}
}